AUTOOL RT120 – 12V Automotive Relay Tester

The AUTOOL RT120 is a compact and easy-to-use automotive relay tester designed to quickly check the condition and performance of 12V DC relays. It helps technicians verify whether a relay is functioning properly by automatically testing coil activation, contact switching, and response time.

This is the ideal tool for quickly identifying faulty relays in vehicles — saving time, reducing guesswork, and preventing unnecessary parts replacement. Key Features

Designed for testing 12V DC automotive relays

Tests both 4-pin and 5-pin relays

Automatically checks relay coil activation and contact switching

LED indicators clearly show test results (Pass / Fail)

Plug-and-play operation — simply insert relay and press “Test"

Compact, lightweight, and built for workshop or mobile use

Durable construction for daily professional use Technical Specifications

Operating Voltage: DC 12 V

Supported Relay Types: 4-pin and 5-pin

Indicators: LED pass/fail display

Power Source: Vehicle battery or DC 12 V supply

Dimensions: 150 × 85 × 35 mm (approx.)

Weight: ~250 g Ideal For

Automotive workshops and electricians

Technicians diagnosing starting, lighting, or fan relay issues

Mobile repair services and automotive enthusiasts Why Choose the AUTOOL RT120

The RT120 helps detect faulty relays in seconds — saving you from replacing unnecessary parts or chasing false electrical faults. Simple, effective, and reliable, it’s the perfect companion for any diagnostic toolbox. In the Box

AUTOOL RT120 Relay Tester

Power Cable (12 V input)

User Manual ✅ Product Highlights

✔ Tests 12 V automotive relays
✔ Works with 4-pin & 5-pin designs
✔ LED indicator test results
✔ Compact & portable
✔ Plug-and-play simplicity